英文關鍵字
apparatus
appliance
circular
close
closeup
construction
cut
cutting
demonstration
detail
device
disc
electric
engineering
equipment
factory
furniture
grind
grinding
industrial
industry
job
machine
manufacturing
metal
metalwork
occupation
power
processing
production
professional
repair
rotary
rotate
safety
saw
sawing
sequence
small
steel
technology
tool
toolmaking
turning
wheel
wood
work
worker
workshop